Quantity breaks

A quantity-breaks campaign discounts a product more as a shopper buys more of it. You set up one or more levels, each with a minimum (and optionally a maximum) and a discount, and checkout applies whichever level the shopper’s cart reaches.

Discount levels

Each level has:

Field	Meaning
Min quantity (or Min amount)	What unlocks this level.
Max quantity (or Max amount)	Where the level ends. Leave it blank on the top level for no upper limit.
Discount type	Percentage off, Amount off per unit, or Fixed price per unit.
Value	The percentage, amount, or fixed price.
Title, subtitle, badge	Optional — replace the generated “Buy 2–3” wording on the widget with your own.

You can add up to 10 levels. What is being counted toward a level — a single variant, a whole product, a collection, or everything the campaign targets — is set alongside the rest of targeting, on the campaign’s Setup tab; see Targeting.

Discount basis: quantity or amount spent

A level unlocks by quantity (units bought) or by amount spent (subtotal, before other discounts). This choice also decides which of the three modes below a level can use — graduated and pack pricing both need whole units, so they’re only available with a quantity basis.

How the discount applies

Mode	What it means
All units get the same discount	A volume discount — once a shopper reaches a level, every qualifying unit gets that level’s discount.
Each unit gets its own discount	Tiered pricing — cheapest units fill the lower levels first, like a tax bracket. A shopper buying 5 units against “1–3 full price, 4+ 20% off” pays full price for 3 units and 20% off the other 2.
Buy in packs	The cart is split into whole packs of the size you set; each full pack gets its discount and any leftover units stay full price.

How the price shows in the widget

Under a campaign’s Widget tab, you choose whether the product page shows Discount only, Price per item, or Total price for the selected level, plus an optional “You save” line and a struck-through compare-at price. The per-level title, subtitle, and badge text above let you override the generated wording level by level.

Note

For percentage discounts, Nock Deals hands Shopify a percentage rather than a precomputed amount, and Shopify applies it to each unit in the line individually — rounding down to the nearest cent per unit, not on the line as a whole. On a cart with several units, the total discount can end up a cent or two less than a plain “subtotal × percentage” calculation. Amount-off and fixed-price levels don’t have this gap, since those are exact cent values from the start.

Related: Buy X get Y and Cart goals cover the app’s other two campaign kinds; Scheduling and status covers when a level actually goes live.